CVE Database›CVE-2020-13974

CVE-2020-13974

kernel: integer overflow in k_ascii() in drivers/tty/vt/keyboard.c

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Severity

Moderate

Red Hat Product Security

7.8

CVSS 3.1

Review impact separately from score.

Published · March 22, 2020

Updated · June 28, 2026

Description

A flaw integer overflow in the Linux kernel's virtual terminal keyboard driver was found in the way the user sends some specific keyboard code multiple times. A local user could use this flaw to crash the system or possibly escalate their privileges on the system.

Statement

No code depends on this integer overflow so it is unlikely that the vulnerability can be used for anything apart from crashing the system. The impact has been reduced to Moderate from Important based on this analysis.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

CVSS / CWE

CVSS 3.1 · 7.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE-190 · Integer Overflow or Wraparound